SmartFTP hangs on upload

When uploading a file, the application hangs for a long time. 
 
Can't request support using the application since we're using version 3.0 currently. Attached is the dump file during the hang.
 
http://www69.zippyshare.com/v/pcCsMi9N/file.html
 
 

Version 3.0 has reached EOL a few years ago. Please install the latest version and try again:
https://www.smartftp.com/download